window crank

A quick learner from Madeira Beach FL says:
On the inside of the crank it says... 4RH 18-0821.

I need 3 right hand and 1 left hand.
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Bob from SWISCO responded:

Can you show me a picture of the hardware in question? That would help narrow things down. Many thanks. 

A quick learner from Madeira Beach FL says:
Here are 2 Pics
Thumbnail of the uploaded file named RH 18-0821Pic1.JPG
Thumbnail of the uploaded file named RH 18-0821Pic2.JPG
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Bob from SWISCO responded:

We're getting there. Can you show me an undamaged version of the operator from behind? Seeing the hole pattern on the tabs above and below the body is crucial for identification. From there I should be able to narrow this down for you. 

A quick learner from Madeira Beach FL says:
1 screw hole top and 2 at the bottom.
Thumbnail of the uploaded file named NewCrank1.JPG
Thumbnail of the uploaded file named NewCrank2.JPG
Thumbnail of the uploaded file named NewCrank3.JPG
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Bob from SWISCO responded:

Thanks for getting back to me. I believe this might be our 39-025 and 39-026 type operator. Look over all the dimensions and specifications, and let me know if you agree. 

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